SU1205111A1 - Device for automatic control of exposure - Google Patents

Description

 one

The invention relates to instrumentation, in particular to devices for automatic exposure control.

The purpose of the invention is to increase the reliability and accuracy of exposure control.

The drawing shows the scheme of the device for automatic control of the exposure.

The device for automatic exposure control comprises a series-connected power source 1 and the first key element 2, an actuator 3 consisting of the first drive 4 and the second key element 5 connected in series to another terminal to the common bus 6, and the first capacitor 7, as well as bus 8 control. In addition, the device contains an element OR-HE 9 connected between the control and control buses 8 and the control input of the first key element 2, the first 10 and second 11 diodes connected by anodes to the output of the first key element 2, and the second capacitor 12. Actuator 3 also includes a second drive 13 connected in series and a third key element 14 connected by another output to a common bus 6. The second 5 and third 14 key elements are connected by control inputs to the corresponding 2051112

control buses 8, and the first 4 and second 13 drives are connected by other leads to the cathodes of the first 10 and second 11 diodes, respectively, directly and to the common bus 6 via the first 7 and second 12 capacitors.

The device works as follows.

When entering one of the tires 8

10 control signal Opened by the signal from the output of the element OR-HE 9, the first key element 2 is closed, the circuit is opened between the power source 1 and the first 10 and second 11 diodes.

15 By the same signal, the second key element 5 is opened, discharging the first capacitor 7 to the first actuator 4, which provides the beginning of the exposure. When a command is received, the first key element 2 continues to remain open, and the third key element 14 is closed, discharging the second capacitor 12 to the second drive 13, which provides the end of the exposure. After the signal is removed. Closed on the control buses 8, a signal is established, ensuring the closing of the first key element 2 and the charge of the capacitors 7

30 and 12 from the power source 1 via diodes 10 and 11.

The use of the invention allows to increase the reliability and accuracy of exposure control compared to

JC known device.

Editor A. Ogar

Compiled by V. -Dobrovolsky

Tehred S. Migunova Corrector M. Pojo

Order 8527/49 Circulation 447Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35u Uzhgorod, ul. Project, 4

Branch. PShT Patent, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR AUTOMATIC EXPOSURE CONTROL, comprising a serially connected power source and a first key element, an actuator comprising a serially connected first drive and a second key element connected by a different terminal to a common bus, NOT connected between the control buses and the control input of the first key element, the first and second diodes connected by the anodes to the output of the first key element, and the second capacitor, and a second drive and a third key element connected in series to the common bus by another output connected to the actuator moreover, the second and third key elements are connected by control inputs to the corresponding control buses, and the first and second drives are connected by other terminals, respectively, to the cathodes of the first and the second diodes directly and to the common bus through the first and